getrandom.2: Mention bug concerning treatment of interrupts

Theodore Ts'o confirmed the bug described in
https://lkml.org/lkml/2014/11/29/16

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

diff --git a/man2/getrandom.2 b/man2/getrandom.2
index 59ebbe00d4fb55957d6f062cc2792e17dbacc789..d01502e395691f5aab9b9abf71b438ec0810d23a 100644 (file)
--- a/man2/getrandom.2
+++ b/man2/getrandom.2
@@ -23,7 +23,7 @@
 .\" the source, must acknowledge the copyright and authors of this work.
 .\" %%%LICENSE_END
 
-.TH GETRANDOM 2 2014-10-03 "Linux" "Linux Programmer's Manual"
+.TH GETRANDOM 2 2015-01-22 "Linux" "Linux Programmer's Manual"
 .SH NAME
 getrandom \- obtain a series of random bytes
 .SH SYNOPSIS
@@ -257,6 +257,13 @@ failure:
 }
 .fi
 .in
+.SH BUGS
+As of Linux 3.19, the following bug exists:
+.PP
+.\" FIXME patch proposed https://lkml.org/lkml/2014/11/29/16
+Depending on CPU load
+.BR getrandom ()
+does not react to interrupts before reading all bytes requested.
 .SH SEE ALSO
 .BR random (4),
 .BR urandom (4)